The optimal temperature range for transmission fluid is 175 to 220 degrees. Above that, for every 20 degrees bad things happen, starting with formation of varnish at 240 degrees, followed by seals hardening, plates slipping, seals and clutches burn out, carbon is formed, and, ultimately, failure.Sep 25, 2018
Tranny fluid is designed to perform it’s best around 175-200F. Tranny fluid that never gets above 235F would be good for at least 50K miles.
The ideal temperature for it is 175 degrees, plus or minus 25 degrees, and when the transmission gets below zero degrees, it gets too thick. The fluid can also fail to lubricate parts when it is too cold, wearing parts down unnecessarily.
Without enough transmission fluid or effective fluid, your transmission will start acting out. The ideal fluid temperature is under 175 degrees, but as fluid ages it starts to break down and lose its capacity to cool down the transmission. This is when transmission overheating occurs. At 220 degrees, varnish forms.
Temperatures from 230-240 have been reached with no damage to the transmission. If you are seeing temps above 225 degrees on a regular basis you should check your fluid level. Fluid levels to high may cause excessive temperature. … These transmissions will run from 200-230 in the summer months when towing in hilly areas.
Transmission shifting hard issues can occur due to the presence of impurities in the transmission fluid. This also goes for using the wrong fluid for your transmission system. If the fluid is not right or is contaminated or changes the original color, you have to flush it out.
Warm it up for about 30 seconds to a minute with no driving. You can drive after that but take it easy until the engine/transmission is actually warm. Keeping it under 2500rpm is a good way to do this.
Whether you have a manual transmission or an automatic, the symptoms of a frozen gearbox are basically the same. The car will not shift into gear, and if it does, it will not move. By these standards you can determine if your transmission is frozen.
Reasons for overheating include low fluid levels, leaks, burned, old or dirty fluid, or problems with the solenoid. You can ensure the long life and efficient performance of your transmission – and your car – by doing some things to make sure it does not run too hot.
190 Degrees Fahrenheit (1999-2009 2013 Cummins) 200 Degrees Fahrenheit (2010-2012 Cummins)
The normal transmission temperature when towing is approximately the same as the engine temperature, that is, approximately 195°F. The temperature inside the torque converter, while pulling a large load from a permanent start, could easily rise by above 350°F.
Fluid Life Expectancy vs Temperature
The ideal operating temperature of transmission fluid is 175 degrees. Overheating occurs after the temperature surpasses 200 degrees, and the failure rate doubles for every additional 20 degree increase after that.
Anything under 235 is normal temp for these engines, and is where they are designed to run. As for the trans, anything under 220 or so is fine. Even 220 isn’t bad if your towing. if it has the factory DEX VI in it, it is good to around 235-240 without much breakdown.
Normal operating temps will range from 180-200 aprox 100 degrees above ambient air temps. These transmissions will run from 200-230 in the summer months when towing in hilly areas.
Adding a simple auxiliary cooler inline with the factory unit can nearly double the life of transmission fluid, keeping your gearbox happy and healthy for a long time. Also helpful are aftermarket aluminum pans. Their added fluid capacity and finned heat-sink design provide additional cooling as well.
Yes, over cooling transmission fluid may cause some issues such as gelling up and restricting flow through the cooler lines and cooler itself, but this isn’t too common. This may occur when temperatures are consistently below freezing.
There are 6 ways to improve automatic transmission performance and reliability. These are servicing the transmission, changing driving habits, driving with lower gears when loaded, maintaining engine performance, having proper alignment of tires, and having the correct tire size.
When your car has low levels of transmission fluid, it may cause your transmission to shake or jerk, especially when you are making a shift change. If you are noticing a lot of jerking and shaking when you shift gears, you may have bad engine mounts. They may cause your entire vehicle to move.
There really isn’t a reason to warm it up, unless you are in extreme sub-zero temps. Letting the engine idle for a couple minutes should do the trick (that is even a hot debate). If you are experiencing trouble shifting when the trans is cold, it could be an indication of upcoming issues, so get it checked out.
When the temperature drops, transmission fluids with poor cold-flow properties can thicken and cause elongated and hard shifts until the fluid has warmed up enough to flow properly. Switching to a high-quality synthetic transmission fluid will help.
The vehicle will make noise when cold for several reasons. If you belts are loose at all, it may take them a while to warm up and grip the pulleys the way they are designed. … Cold fluids will also cause noises. The power steering pump, engine oil, and transmission fluid all needs to warm up before they work properly.
Set the parking brake, place the transmission in PARK (P) and allow the engine to idle until the transmission temperature falls below 265°F (130°C).” My personal transmission temperature redline is 250°F before I start looking for a place to pull over and cool it down.
Most experts agree that your engine should run between 195 degrees and 220 degrees.
The Cummins 5292742 Cross References:
The replacement 200 thermostats are required for the right engine operating temperatures on the Dodge diesel.
duratothemax said: 250* for the “hot” engine warning. 255* for the “very hot” engine warning.
205 -210 is normal for warm weather.
How hot is too hot for diesel? You can run up to 220°F all day long without any problems. The fluid will last a long, long time at that temperature. You can run up to 250°F for up to a half hour at a time.
Even running in the 200-220°F range isn’t bad, although I wouldn’t want to run there all day long. Brief spikes over that (to 240°F) are also OK. I would be uneasy running over 240°F, although brief spikes above this will not instantly kill your trans. Cooler is better (for durability).
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